Body mass index (dictionary definition)

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Body mass index

Body mass index (BMI) is a ratio of a person's weight to height that has been recognised by the US National Institutes of Health (NIH) and The World Health Organisation as a measure of obesity.

  • BMI < 19 = UNDERWEIGHT
  • 20 - 25 = ACCEPTABLE
  • 26 - 30 = OVERWEIGHT
  • >30 = OBESE